Effects of Dehydration on the Crystalline Structure and Strength of Developing Cotton Fibers

Hu, Xiaoping; Hsieh, You‐Lo

doi:10.1177/004051750107100308

Cited by 27 publications

(30 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The observed CI XRD readings from a small set of fibers at various growth periods were in good agreement with previously reported values for two cotton varieties at different developmental stages. 1,3 When making a comparison with cottons from commercial bales, the observed CI XRD values were between the reported CI range 73-80% (on Turkmenistan and Uzbekistan native cottons) 16 and those of either 53-69% (on Egyptian cottons) 17 or 57-64% (on Saudi Arabian cottons). 18 Hence, they concluded that using ATR-FTIR to assess the cotton fiber CI was appropriate and reasonable.…”

mentioning

confidence: 69%

Preliminary study of relating cotton fiber tenacity and elongation with crystallinity

Liu

Thibodeaux

Gamble

et al. 2014

Textile Research Journal

View full text Add to dashboard Cite

A fundamental understanding of the relationship between cotton fiber strength (or tenacity)/elongation and structure is important to help cotton breeders modify varieties for enhanced end-use qualities. In this study, the Stelometer instrument was used to measure the bundle fiber tenacity and elongation properties of different cotton fibers. This instrument is the traditional fiber strength reference method and could be still preferred as a screening tool owing to its significant low cost and portability. Fiber crystallinity (CI IR ) and maturity (M IR ) were characterized by the previously proposed attenuated total reflection (ATR)-based Fourier transform infrared protocol that has microsampling capability and is suitable for the tiny Stelometer breakage specimens (2 $ 5 mg), which cannot be readily analyzed by a conventional X-ray diffraction pattern. Relative to the distinctive increase in fiber tenacity with either CI IR or M IR for Pima fibers (Gossypium barbadense), there was an unclear trend between the two for Upland fibers (G. hirsutum). Although fiber elongation increases with elevated CI IR and M IR for Pima fibers, it generally decreases as CI IR and M IR increase for Upland fibers. Furthermore, small sets of Upland fibers with known varieties and growth areas were examined, and their responses to both CI IR and M IR are discussed briefly.One of the essential attributes of cotton fibers is strength, which is required to manufacture quality goods for consumers. Over the years, a number of techniques, such as the Mantis single-fiber tester, 1,2 the Instron tensile tester, 3 the Favimat single-fiber tester, 4,5 Fibrotest, 6 the Stelometer bundle tester, 2,5-9 and the high volume instrument (HVI), 2,5,6,9,10 have been developed to measure cotton strength by testing either a single fiber or a bundle of fibers. Comparisons between two or more independent strength tests have been attempted by different investigators. 2,5,6,9 Thibodeaux et al. 2 determined the relationship between the single-fiber (Mantis) strength and two-bundle fiber (Stelometer and HVI) strength and found that both the Stelometer strength and HVI bundle strength are linearly proportional to the ratio of the average Mantis breaking load to the square of the average fiber ribbon width. By analyzing the results of either single-fiber testing from the Favimat or bulky fiber measurements from the HVI and Stelometer, Delhom et al. 5 reported that single-fiber testing results in higher mean values than bundle testing. In a more recent investigation, Cui et al. 6 observed that the Fibrotest absolute strength is lower than the Stelometer strength. There was also a report on the general conversion between the two bundle strength readings from the Stelometer and HVI measurements. 9

show abstract

mentioning

confidence: 69%

Preliminary study of relating cotton fiber tenacity and elongation with crystallinity

Liu

Thibodeaux

Gamble

et al. 2014

Textile Research Journal

View full text Add to dashboard Cite

show abstract

“…Dehydration of natural fibers has been shown to decrease the crystallinity 5 and the order 6 of the crystalline domains in never-dried cotton. This loss can be controlled to some extent by slowly drying cotton at high temperatures, as demonstrated by Iyer et al, who were able to retain a higher degree of crystallinity of the fibers in the final dry state.…”

Section: Introductionmentioning

confidence: 99%

Molecular Orientation in Dry and Hydrated Cellulose Fibers: A Coherent Anti-Stokes Raman Scattering Microscopy Study

et al. 2010

View full text Add to dashboard Cite

Coherent anti-Stokes Raman scattering (CARS) microscopy is combined with spontaneous Raman scattering microspectroscopy and second harmonic generation (SHG) microscopy to interrogate the molecular alignment in dry and hydrated cellulose fibers. Two types of cellulose were investigated: natural cellulose I in cotton fibers and regenerated cellulose II in rayon fibers. On the basis of the orientation of the methylene symmetric stretching vibration, the molecular alignment of cellulose microfibrils is found to be conserved on the micrometer scale. Whereas the molecular orientation in cotton shows modest variability along the fiber, the alignment of the cellulose units in rayon is highly consistent throughout the fiber. The ordered alignment is retained upon fiber hydration. Upon hydration of the cellulose fibers, an anisotropic electronic contribution is observed, which indicates an ordered incorporation of water molecules into the fiber structure. The third-order and second-order electronic polarizability of cellulose I are directed along the axis of the polyglucan chain. No second-order optical response is observed in cellulose II, supporting the antiparallel arrangement of the polyglucan chains in regenerated cellulose.

show abstract

“…Due to the low extractives content of balsa (1% by mass) in comparison to other woods (higher than 8% by mass) [10], [11], and the high crystallinity of its cellulose (around 90%) which can provide better mechanical properties, dimensional stability, chemical resistance, balsa can represent a great alternative raw material to produce cement-bonded particleboards [12].…”

mentioning

confidence: 99%

Evaluation of accelerated carbonation curing in cement-bonded balsa particleboard

et al. 2018

View full text Add to dashboard Cite

This study aimed to assess the potential usage of balsa wood to produce cement-bonded particleboards as well as to study the effects of accelerated carbonation on the cement-bonded balsa particleboard. Particleboards were subjected to two different curing conditions, (1) conventional curing: control-curing for 48 h in a climatic chamber, followed by 25 days in a saturated environment (98 ± 2%) in sealed plastic bags at 23°C, (2) accelerated carbonation-curing for 48 h in a climatic chamber, and then in environment with CO 2 (24 h concentration of 15%), followed by 24 days in a saturated environment (98 ± 2%) in sealed plastic bags at 23°C. After 28 days of curing, the particleboards degree of carbonation was evaluated by TG-DTG and XRD analysis. Thermal, physical and mechanical characterizations were conducted following the recommendations of ASTM-E1530 and DIN: 310, 322, 323 standards, respectively. Accelerated carbonation decreased the portlandite content and increased of calcium carbonate content of the studied particleboards. Thermal properties showed that the particleboards could be used as an insulation material in accordance to European Standard (BS EN 13986). Physical and mechanical properties of the studied materials showed that they are potential building particleboard, because this material satisfied the requirements of ISO 8335 standard. Keywords Accelerated carbonation Á Forestry products Á Wood Á Portland cement Á Cement composites 1 Introduction Cement-bonded particleboard as building material is already known in many countries, such as the USA,

show abstract

Effects of Dehydration on the Crystalline Structure and Strength of Developing Cotton Fibers

Cited by 27 publications

References 28 publications

Preliminary study of relating cotton fiber tenacity and elongation with crystallinity

Preliminary study of relating cotton fiber tenacity and elongation with crystallinity

Molecular Orientation in Dry and Hydrated Cellulose Fibers: A Coherent Anti-Stokes Raman Scattering Microscopy Study

Evaluation of accelerated carbonation curing in cement-bonded balsa particleboard

Contact Info

Product

Resources

About